In the second half of the opening Monday night doubleheader, Houston is traveling to San Diego to put an end to NFL Week 1. The Chargers are in rebuild mode, while the Texans are looking to take the next step this season and become true Super Bowl contenders. While the Chargers’ fan base should be revved up for this prime-time contest, getting J.J. Watt blocked could be a very futile effort for San Diego’s offensive line. ESPN.com’s Matt Williamson and Houston Texans reporter Tania Ganguli bring you their Double Coverage preview.

Tania Ganguli: How has the atmosphere in the organization changed with GM Tom Telesco and coach Mike McCoy taking over?

Matt Williamson: A change in San Diego was certainly needed. The environment had become stale and the once wide-open window under former coach Norv Turner and a roster stocked with great players has closed. A rebuild is needed, and a new general manager and head coach are what is needed to potentially get this team back where it once was -- or maybe beyond. Has the right side of the Texans’ once-great offensive line been fixed?

Ganguli: It's certainly on its way. The Texans are rightfully very high on right guard Brandon Brooks, and right tackle Derek Newton is healthy. They didn't mind rotation in those spots last year, but stability will definitely help.

Williamson: I feel as though we have seen the best of Rivers’ impressive career, unfortunately. That being said, the scheme change, which stresses getting the ball out of Rivers’ hands quicker, could be an advantageous move to boost Rivers. He does have a quick release and makes quick reads, making him a good fit for what McCoy is looking to accomplish.

What is the status of Arian Foster, and might Ben Tate have an expanded role for the season and to open the year?

Ganguli: Tate will have an expanded role, especially early in the year. The Texans won't ride Arian Foster too much given he missed all of the preseason, training camp and most of organized team activities (OTAs). He was working, but they're intent on being smart with his return to make sure they have him at full strength late in the season.

What are the biggest problems with the Chargers' offensive line?

Williamson: Once again, the scheme switch to a short passing game should help the protection of this line -- a line that is better-equipped to run block than protect. Still, the true problem with this line is they simply lack good players up front. They added a few free agents, but no one that is even a league-average starter, and they used their first-round pick on D.J. Fluker to play right tackle. However, I have my doubts that Fluker is quick or light enough on his feet for edge protection. Instead, I think Fluker could be a Pro Bowler at guard.

What impact does first-round pick DeAndre Hopkins have on the Texans' offense?

Ganguli: It's difficult for rookie receivers to put up big numbers, but Hopkins will have a major impact on the Texans' offense. He'll take pressure off Andre Johnson, on whom the Texans were overdependent last season in their passing game. He is very skilled on contested catches and will help Houston's red zone efficiency.

Williamson: Can he still be productive at 33? Of course it would be ideal to have Melvin Ingram in the fold as well as Freeney, who could be the perfect mentor, but Freeney has looked quite spry through the preseason and should have plenty left in the tank. The concern for me is that San Diego will be forced to play the 33-year-old too many snaps, which could lead to less effective play late in games and especially late in the season.

How big a boost to this team -- tacitly and emotionally -- is it to get Brian Cushing back on the field?

Ganguli: Cushing makes a difference in both ways. He creates mismatches in the pass rush that free up the outside linebackers. His presence in the middle makes things easier on the Texans' defensive backs, too. Emotionally, Cushing provides an edge for the Texans' defense. His maniacal intensity is contagious and the Texans feed off it.

Williamson: While Mathews is a decent pass-catcher, Woodhead is an exceptional all-around contributor in the passing game. Their roles should be very distinctive, with Mathews -- who has looked excellent this preseason -- as the early-down workhorse (if he can hold up) and Woodhead being the specialty movement player that is equal parts running back and slot receiver.

Watt is a rare interior pass-rusher, but does Houston have enough pressure coming from their 3-4 outside linebackers?

Ganguli: That remains to be seen. It's definitely been a focus for the Texans' outside linebacker group. Whitney Mercilus, now in his second year, has taken over as a starter opposite Brooks Reed after the departure of Connor Barwin. Mercilus set a franchise record for rookies with six sacks last season, but he missed most of training camp and the preseason. Reed is healthier than he was at the end of last season when he returned from a groin injury. He had an offseason surgery to repair it fully.